Clinical Development & Regulatory Approval Failure: Products may not successfully complete clinical trials or receive necessary regulatory approvals from agencies like the FDA, preventing their commercialization.

Market Competition & Product Adoption: Approved products may face intense competition from existing or new therapies, fail to achieve expected market acceptance, or suffer from declining sales due to evolving market dynamics or physician prescribing habits.

Intellectual Property Expiration & Infringement: Patents protecting key products may expire or be successfully challenged by generic manufacturers or competitors, leading to significant revenue loss and increased competition.